Try to set the property "caps" on the appsrc instead of using a capsfilter. But setting full caps is still a need, maybe to work properly appsrc need to have the caps property defined, i never used appsrc, only appsink, and using only capsfilters usually worked when i needed then, but i remember that some problems with udpsrc where solved when i defined the "caps" property. best regards, Katcipis <div class="gmail_quote">On Mon, Mar 1, 2010 at 3:05 AM, na <<a href="mailto:nahmed31@hotmail.com">nahmed31@hotmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hello Katcipis, Thanks for your kind reply. I changed the caps on the appsrc buffer and caps filter to: <div class="im"> GstCaps *rescaps; rescaps = gst_caps_new_simple("audio/x-raw-int", "rate", G_TYPE_INT, </div>48000, "channels" ,G_TYPE_INT, (gint)1, "endianness",G_TYPE_INT,(gint)1234, "width", G_TYPE_INT, (gint)8, "depth", G_TYPE_INT, (gint)8, "signed", G_TYPE_BOOLEAN, TRUE, NULL); <div class="im"> g_object_set(capsfilt_res,"caps",rescaps,NULL); </div> GstCaps *caps; caps = gst_caps_new_simple("audio/x-raw-int", "rate", G_TYPE_INT, 8000, "channels" ,G_TYPE_INT, (gint)1, "endianness",G_TYPE_INT,(gint)1234, "width", G_TYPE_INT, (gint)8, "depth", G_TYPE_INT, (gint)8, "signed", G_TYPE_BOOLEAN, TRUE, NULL); gst_buffer_set_caps(app_buffer_src,caps); However, the result is the same "not negotiated" error. I have attached the relevant debug output. If you do have any other ideas, please do let me know. Thanks Best regards, Nadeem 0:00:00.219005295 3697 0x884d008 INFO GST_EVENT gstevent.c:597:gst_event_new_new_segment_full: creating newsegment update 0, rate 1.000000, format bytes, start 0, stop -1, position 0 0:00:00.220594821 3697 0x884d008 INFO GST_STATES gstelement.c:2238:gst_element_continue_state:<appsrc> completed state change to PAUSED 0:00:00.220625877 3697 0x884d008 INFO GST_STATES gstelement.c:2251:gst_element_continue_state:<appsrc> posting state-changed READY to PAUSED 0:00:00.220644133 3697 0x884d008 INFO GST_STATES gstbin.c:2425:gst_bin_change_state_func:<pipeline0> child 'appsrc' changed state to 3(PAUSED) successfully 0:00:00.220765315 3697 0x8956458 WARN basetransform <div class="im">gstbasetransform.c:1969:gst_base_transform_handle_buffer:<audiores> error: not negotiated </div>0:00:00.220820395 3697 0x8956458 WARN basetransform <div class="im">gstbasetransform.c:1969:gst_base_transform_handle_buffer:<audiores> error: not negotiated </div>0:00:00.220877203 3697 0x8956458 INFO GST_ERROR_SYSTEM gstelement.c:1763:gst_element_message_full:<audiores> posting message: not negotiated 0:00:00.220930220 3697 0x8956458 INFO GST_ERROR_SYSTEM gstelement.c:1786:gst_element_message_full:<audiores> posted error message: not negotiated 0:00:00.220960984 3697 0x8956458 INFO basesrc gstbasesrc.c:2326:gst_base_src_loop:<appsrc> pausing after gst_pad_push() = not-negotiated 0:00:00.221001947 3697 0x8956458 WARN basesrc <div class="im">gstbasesrc.c:2378:gst_base_src_loop:<appsrc> error: Internal data flow error. </div>0:00:00.221025676 3697 0x8956458 WARN basesrc <div class="im">gstbasesrc.c:2378:gst_base_src_loop:<appsrc> error: streaming task paused, reason not-negotiated (-4) </div>0:00:00.221057825 3697 0x8956458 INFO GST_ERROR_SYSTEM gstelement.c:1763:gst_element_message_full:<appsrc> posting message: Internal data flow error. 0:00:00.221090188 3697 0x8956458 INFO GST_ERROR_SYSTEM gstelement.c:1786:gst_element_message_full:<appsrc> posted error message: Internal data flow error. 0:00:00.221205570 3697 0x8956458 INFO GST_STATES gstbin.c:2815:bin_handle_async_done:<pipeline0> committing state from READY to PAUSED, old pending PLAYING 0:00:00.221236480 3697 0x8956458 INFO GST_STATES gstbin.c:2844:bin_handle_async_done:<pipeline0> continue state change, pending PLAYING -- View this message in context: <a href="http://n4.nabble.com/issue-with-appsrc-and-audioresample-tp1572395p1573184.html" target="_blank">http://n4.nabble.com/issue-with-appsrc-and-audioresample-tp1572395p1573184.html</a> <div><div></div><div class="h5">Sent from the GStreamer-devel mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. <a href="http://p.sf.net/sfu/intel-sw-dev" target="_blank">http://p.sf.net/sfu/intel-sw-dev</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </div></div></blockquote></div>